branch boyceg: added missing virtual keyword to IBStrategy::registerIBHierarchyIntegrator()
branch boyceg: added missing virtual keyword to IBStrategy::registerIBHierarchyIntegrator()

huahbo/IBAMR,yaojieuh/IBAMR,yaojieuh/IBAMR,huahbo/IBAMR,yaojieuh/IBAMR,iamciera/IBAMR,yaojieuh/IBAMR,iamciera/IBAMR,iamciera/IBAMR,yaojieuh/IBAMR,yaojieuh/IBAMR,iamciera/IBAMR,huahbo/IBAMR,huahbo/IBAMR,iamciera/IBAMR,huahbo/IBAMR,huahbo/IBAMR,huahbo/IBAMR,iamciera/IBAMR,iamciera/IBAMR,yaojieuh/IBAMR